近年来,由于“温室效应”,全球气温有逐渐上升的趋势,柑桔生产面临一个新的问题,即“热害”问题。一九八八年,我国柑桔产区由于花期高温,果实膨大期高温干旱,导致了柑桔大量落花落果,使一些产区产量锐减,给我国柑桔生产带来严重损失。因此,很有必要进行柑桔耐热性的遗传、生理生化研究,为生产上选用耐热品种、砧木提供依据。但这方面的研究报道极少。本试 In recent years, due to the “greenhouse effect”, global temperatures have gradually risen, and citrus production faces a new problem, namely “heat damage”. In 1988, due to the high temperature of flowering and the high temperature and drought of the fruit expanding period in citrus producing areas of our country, a great deal of flowers and deciduous fruits were caused in citrus so that the output of some producing areas sharply dropped, causing serious losses to the production of citrus in our country. Therefore, it is necessary to carry out the genetic, physiological and biochemical studies of citrus heat resistance, provide the basis for the selection of heat-resistant varieties, rootstocks. However, few studies have been reported in this area. This test